Adaptive communication and cooperative MIMO cluster formation for improved lifetime in wireless sensor networks

M. A. M. Marinho, J. Costa, F. Antreich, E. P. Freitas, A. Vinel
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引用次数: 5

Abstract

One of the main limitations that still keeps Wireless Sensor Networks (WSNs) from being adopted in a large scale is the limited energy supply, i.e. the lifetime of the nodes that constitute the network. The wireless communication between nodes is responsible for most of the energy consumed in WSNs. A promising method to improve the energy efficiency is the usage of a Cooperative Multiple Input Multiple Output (CO-MIMO) scheme, where nodes form clusters to transmit and receive signals using a virtual antenna array. This work presents a study on the energy consumption of multi-hop and single-hop transmission compared to CO-MIMO and how to select the most efficient method. It also proposes a method for adaptively choosing the number of nodes that form a CO-MIMO cluster in order to maximize the lifetime of the network and to avoid disconnections. The proposed method takes into account not only the total energy consumption but also the distribution of energy within the network, aiming to keep the energy distribution across the network as uniform as possible. The effects of the proposed methods in the total available energy of the network and in the distribution of the energy is presented by means of numerical simulations.
改进无线传感器网络寿命的自适应通信和协同MIMO集群形成
无线传感器网络(wsn)被大规模采用的主要限制之一是有限的能量供应,即构成网络的节点的生命周期。在无线传感器网络中,节点间的无线通信消耗了大部分的能量。一种有前途的提高能源效率的方法是使用合作多输入多输出(CO-MIMO)方案,其中节点形成集群,使用虚拟天线阵列发送和接收信号。本文研究了与CO-MIMO相比,多跳和单跳传输的能量消耗以及如何选择最有效的传输方式。提出了一种自适应选择CO-MIMO集群的节点数的方法,使网络的生存期最大化,避免网络中断。该方法既考虑了总能耗,又考虑了网络内的能量分布,力求使整个网络的能量分布尽可能均匀。通过数值模拟,给出了所提方法对网络总有效能量和能量分布的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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